One new 0-200 PSI back mount air compressor pressure gauge. This gauge features a 2.5" face and has 1/4" NPT thread on the back center of the gauge. Air Compressor Pressure/Hydraulic Gauge 2.5" Face Back Mount 1/4" NPT 0-200 PSI See Technical Specs for more information. -1/4" Male NPT Pipe Threads · -Center / Back Mount · -0-200 PSI · -Gauge reads at 0, 50, 100, 150, 200 PSI · -2.5" Face We provide good discount on large quantities order.